CN113622823B

CN113622823B - Hydraulic oscillator

Info

Publication number: CN113622823B
Application number: CN202111066153.2A
Authority: CN
Inventors: 罗永江; 何将福; 赵志强; 胡千庭
Original assignee: Chongqing University
Current assignee: Chongqing University
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-09-30
Anticipated expiration: 2041-09-13
Also published as: CN113622823A

Abstract

The invention discloses a hydraulic oscillator, which comprises a power short section and an oscillation short section, wherein the power short section comprises an upper joint, a cylinder body, a valve core and a lower joint; an adjusting pressure ring and a nozzle are hermetically assembled above the interior of the cylinder body from top to bottom, and the nozzle is supported and limited by a step surface on the cylinder body; the valve core is assembled in the middle section gap in the cylinder body, the cylinder body blocking ring is arranged on the inner wall of the cylinder body, the periphery of the valve core slides up and down along the cylinder body blocking ring, the lower connector is connected with the opening at the lower part of the cylinder body, and the upper connector is connected with the oscillation nipple. The invention has the technical effects that: the structure is simplified, the manufacture and the assembly are easy, the service life is long, and the reliability is high.

Description

Hydraulic oscillator

Technical Field

The invention belongs to the technical field of drilling, and particularly relates to a hydraulic oscillator.

Background

The hydraulic oscillator is used for extraction drilling or exploration drilling of oil fields, natural gas and coal beds. Conventional hydraulic oscillators include screw type hydraulic oscillators, drive type hydraulic oscillators, turbine type hydraulic oscillators, hydraulic oscillators using rollers and impellers, jet type hydraulic oscillators, and the like. However, the existing hydraulic oscillators have some common problems: the structure is complex, the manufacturing difficulty is high, the service life is short, the reliability is poor, and the like.

The hydraulic oscillator generally comprises a power short section, a valve shaft assembly and an oscillation short section. Chinese patent document CN112282650A discloses a hydraulic oscillator for drilling engineering, which includes a power nipple shell, an oscillation nipple mandrel is sleeved inside the power nipple shell through a spline, the inner wall of the power nipple shell is connected with a vibration pushing sleeve in a sliding manner, the inner cavity of the power nipple shell is provided with a valve assembly located below the vibration pushing sleeve, the top end of the valve assembly is fixedly connected to the inner wall of the power nipple shell, a drilling fluid pushing cavity is arranged between the upper part of the valve assembly and the vibration pushing sleeve, and a flow channel gap is arranged between the middle lower section of the valve assembly and the inner wall of the power nipple shell.

The valve assembly comprises a valve stator and a valve rotor, wherein the valve stator is hollow inside, liquid holes are uniformly formed in the outer wall of the valve stator, an inner cavity of the valve stator is rotatably connected with a rotating shaft rod located at the axis of the rotating shaft rod, and the valve rotor is arranged on the rotating shaft rod. The valve rotor includes side shield and bottom plate, the sliding tray has all been seted up on the outer wall of rotatory axostylus axostyle and side shield, fixedly connected with slider on the outer wall of bottom plate, slider sliding connection is in the inside of sliding tray, side shield fixed connection is on the outer wall of rotatory axostylus axostyle, constitute a top and the drilling fluid between the outer wall of rotatory axostylus axostyle, side shield, bottom plate and valve stator and bulldoze the rivers space that the chamber communicates, and the one side of bottom plate and valve stator contact is the export in rivers space promptly. And magnets are arranged on the bottom surface of the bottom plate and the bottom surface of the inner cavity of the valve stator.

The invention changes the traditional mode of driving the valve rotor to move by using the screw motor, reduces the consumption of the screw on the water pressure energy and improves the conversion rate of the water pressure energy to the water kinetic energy. However, the patent application also has the problems of complex structure, mainly abnormal and complex structure of the valve assembly, increased manufacturing difficulty, high failure rate, short service life and poor reliability.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a hydraulic oscillator which is simple in structure, easy to manufacture and assemble, long in service life and high in reliability.

In order to solve the technical problem, the hydraulic oscillator comprises a power short section and an oscillation short section, wherein the power short section comprises an upper joint, a cylinder body, a valve core and a lower joint; an adjusting pressure ring and a nozzle are hermetically assembled above the interior of the cylinder body from top to bottom, and the nozzle is supported and limited by a step surface on the cylinder body; the valve core is assembled in the middle section gap in the cylinder body, the inner wall of the cylinder body is provided with a cylinder body blocking ring, the periphery of the valve core slides up and down along the cylinder body blocking ring, the lower opening of the cylinder body is connected with the lower joint, and the upper joint is connected with the oscillation nipple.

The upper joint and the central through hole of the regulating pressure ring form a first fluid channel I, the first fluid channel I is communicated with a second fluid channel II formed by a spray hole of a nozzle, and a space between the nozzle and the valve core in the cylinder body forms an upper cavity III; a large round hole in the center of the valve core forms a fourth fluid channel IV, a small hole at the bottom of the large round hole of the valve core forms a sixth fluid channel VI, and downward inclined holes are uniformly formed in the side wall of the lower part of the large round hole of the valve core to form a fifth fluid channel V; and a space formed by the periphery and the outer bottom surface of the valve core below the blocking ring of the cylinder body and the top surface of the lower joint forms a lower cavity VII, and a central small hole of the lower joint forms an eighth fluid channel VIII.

The invention has the technical effects that:

the valve of the invention has simple structure and few movable parts, reduces the manufacturing difficulty of the hydraulic oscillator, improves the qualification rate of finished products and reduces the production cost of the hydraulic oscillator; the compression resistance and the abrasion resistance of parts are improved, and the service life of the hydraulic oscillator is greatly prolonged; the reliability of parts is improved, movable assemblies are reduced, the links of valve rotation and sealing are omitted, and the overall reliability of the hydraulic oscillator is greatly improved.

Drawings

The drawings of the invention are illustrated as follows:

FIG. 1 is a schematic structural diagram of a power nipple of the present invention;

fig. 2 is a block diagram of one embodiment of the present invention.

In the figure, 1, an upper joint, 2, an adjusting pressure ring, 3, a nozzle, 4, a cylinder body, 41 and a cylinder body retaining ring; 5. a valve core 6 and a lower joint;

I. the first fluid channel, the second fluid channel, the third fluid channel, the upper cavity, the IV fluid channel, the fourth fluid channel, the V fluid channel, the fifth fluid channel, the VI fluid channel, the sixth fluid channel, the VII fluid channel, the lower cavity, the VIII fluid channel and the eighth fluid channel;

7. the device comprises an oscillating short section 7-1, a mandrel 7-2, an outer cylinder 7-3, a disc spring 7-4, a piston 7-5 and a connector.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

for the purpose of clearly describing the content of the invention, the present patent application uses the terms "upper" and "lower" to distinguish them, which are determined according to the arrangement orientation of the above drawings, and the orientation of the invention is changed in the practical use direction, and the name of the orientation is changed accordingly, which should not be construed as limiting the scope of the patent protection.

As shown in fig. 1 and 2, the hydraulic oscillator comprises a power short section and an oscillation short section 7, wherein the oscillation short section is a universal short section, the power short section comprises an upper joint 1, a cylinder body 4, a valve core 5 and a lower joint 6, the upper joint 1 is arranged at an opening at the upper part of the cylinder body 4, and the bottom of the upper joint 1 is in sealing joint with an adjusting press ring 2; the upper part inside the cylinder body 4 is hermetically provided with an adjusting pressure ring 2 and a nozzle 3 from top to bottom, and the nozzle 3 is supported and limited by the step surface on the cylinder body 4; a valve core 5 is assembled in the middle section gap in the cylinder 4, a cylinder block ring 41 is arranged on the inner wall of the cylinder 4, the periphery of the valve core 5 slides up and down along the cylinder block ring 41, a lower joint 6 is connected to the lower opening of the cylinder 4, and an upper joint 1 is connected with an oscillation nipple 7; the lower joint 6 is connected with other well tools.

The nozzle 3 is a quick-wear part, and the adjusting pressure ring 2 separates the nozzle from the diversion sealing section, so that the equipment replacement cost can be reduced.

As shown in fig. 1, the fluid passages of the present invention are arranged as follows: the upper joint 1 and the central through hole of the regulating pressure ring 2 form a first fluid channel I, the first fluid channel I is communicated with a second fluid channel II formed by a jet flow hole of the nozzle 3, and a space between the nozzle 3 and the valve core 5 in the cylinder body forms an upper cavity III; a large round hole in the center of the valve core 5 forms a fourth fluid channel VI, a small hole at the bottom of the large round hole of the valve core forms a sixth fluid channel IV, and downward inclined holes are uniformly formed in the side wall of the lower part of the large round hole of the valve core to form a fifth fluid channel V; and a space formed by the periphery and the outer bottom surface of the valve core 5 below the cylinder block ring 41 and the top surface of the lower joint 6 forms a lower cavity VII, and a small hole in the center of the lower joint 6 forms an eighth fluid channel VIII.

The valve action principle of the invention is as follows:

fluid enters the nozzle 3 through the first fluid channel I, high-speed fluid is formed in the second fluid channel II and is rapidly sprayed into the fourth fluid channel IV of the valve core 5, and the fluid in the upper cavity III is sucked into the fourth fluid channel IV, so that the pressure of the upper cavity III is reduced; fluid enters the lower cavity VII through a fifth fluid channel V and a sixth fluid channel VI of the valve core 5, and because the radius of the eighth fluid channel VIII is small, interception is formed, pressure is held in the lower cavity VII, and the pressure of the lower cavity VII is increased; the pressure difference between the upper chamber III and the lower chamber VII pushes the valve core 5 to move upwards until the fifth fluid channel V of the valve core is completely sealed by the cylinder block ring 41, then, the fluid entering the fourth fluid channel IV from the second fluid channel II can not be discharged in time, so that the pressure of the upper chamber III rises, the fluid in the lower chamber VII flows out through the eighth fluid channel VIII, the pressure of the lower chamber VII drops, the pressure difference between the upper chamber III and the lower chamber VII enables the valve core 5 to decelerate and move reversely, and the valve core moves downwards until the fifth fluid channel V is completely opened. Thereby, the flow passage switching is realized, and the valve core 5 reciprocates up and down.

The reciprocating opening and closing action of the valve core 5 can cause the fluid pressure in the drilling tool at the upstream of the power short circuit to generate periodic fluctuation in a certain range, so that the vibration power is provided for the oscillating short circuit.

The existing oscillating short section belongs to the mature technology and is put into production and use, and the working principle of the invention is described by combining the existing oscillating short section:

as shown in fig. 2, the oscillating nipple 7 is connected with the power nipple of the invention through a port 7-5, when the upward movement of the valve core 5 closes the fifth fluid channel V, because high-pressure fluid in the drilling tool can not be discharged in time, high-pressure pulse is generated to push the piston 7-4 to move upwards, the piston 7-4 applies pressure to the disc spring 7-3, the whole oscillation short circuit moves upwards relative to the mandrel 7-1, when the valve core 5 moves downwards to open the fifth fluid channel V, high-pressure fluid in the drilling tool can be smoothly discharged, the whole pressure in the drilling tool is reduced, the piston 7-4 is pushed to move downwards by the elastic potential energy of the disc spring 7-3, so that the reciprocating motion of the piston is realized, as the shaft core 7-1 is fixed with the drill pipe, the piston drives the outer cylinder 7-2 to reciprocate up and down, so that the short section can oscillate, and the preset function of the hydraulic oscillator is completed.

Claims

1. The utility model provides a hydraulic oscillator, includes power nipple joint and oscillation nipple joint (7), characterized by: the power nipple comprises an upper joint (1), a cylinder body (4), a valve core (5) and a lower joint (6), the upper joint (1) is installed at an opening in the upper part of the cylinder body (4), and the bottom of the upper joint (1) is in sealing joint with the adjusting compression ring (2); an adjusting pressure ring (2) and a nozzle (3) are hermetically assembled above the inner part of the cylinder body (4) from top to bottom, and the nozzle (3) is supported and limited by a step surface on the cylinder body (4); a valve core (5) is assembled in the middle section gap in the cylinder body (4), a cylinder body baffle ring (41) is arranged on the inner wall of the cylinder body (4), the periphery of the valve core (5) slides up and down along the cylinder body baffle ring (41), a lower joint (6) is connected to an opening in the lower part of the cylinder body (4), and an upper joint (1) is connected with an oscillation short section (7);

the fluid channel of the hydraulic oscillator is arranged as follows: the upper joint (1) and a central through hole of the adjusting pressing ring (2) form a first fluid channel I, the first fluid channel I is communicated with a second fluid channel II formed by a jet flow hole of the nozzle (3), and an upper cavity III is formed in a space between the nozzle (3) and the valve core (5) in the cylinder body; a large round hole in the center of the valve core (5) forms a fourth fluid channel VI, a small hole at the bottom of the large round hole of the valve core forms a sixth fluid channel IV, and downward inclined holes are uniformly formed in the side wall of the lower part of the large round hole of the valve core to form a fifth fluid channel V; and a space formed by the periphery and the outer bottom surface of the valve core (5) below the cylinder block ring (41) and the top surface of the lower joint (6) forms a lower cavity VII, and a small hole at the center of the lower joint (6) forms an eighth fluid channel VIII.